Amplifier



FIG. 1 is a front elevational view of the amplifier;

FIG. 2 is a rear elevational view of the amplifier;

FIG. 3 is a top plane view of the amplifier;

FIG. 4 is a bottom plane view of the amplifier;

FIG. 5 is a right side elevational view of the amplifier;

FIG. 6 is a left side elevational view of the amplifier; and,

FIG. 7 is a perspective view of the amplifier. 

We claim the ornamental design for the amplifier, as shown and described. 